Resizing an UIImageView via UIViewPropertyAnimator makes loaded image disappear and placeholder appear

[m4p]

Resizing an UIImageView via UIViewPropertyAnimator makes loaded image disappear and placeholder appear

[m4p]

This is caused by the UIView.transition used by Kingfisher in makeTransition() still being part of the UIImageView and being triggered in reverse. It needs to be removed after it is finished. Unfortunately it seems UIViewPropertyAnimator captures it and prevents it from being removed automatically.

A hacky workaround that seems to work is:

        imageView.kf.setImage(with: imageUrl, placeholder: placeholder, options: [.transition(.fade(0.4)), .forceRefresh, .waitForCache]) { _ in
            if let keys = self.layer.animationKeys(), keys.contains("contents") {
                self.imageView.layer.removeAnimation(forKey: "contents")
            }
        }

[onevcat]

Ummm...

I used the sample code to try to reproduce the issue, but was unsuccessful. There may be other factors causing the problem...

Simulator.Screen.Recording.-.iPhone.8.-.2024-02-18.at.16.18.49.mp4

[m4p]

Here's the complete reproduction Xcode project:
samplecode.zip
I'm using Xcode 15.2 and the iPad (10th gen) simulator.